GOODWILL AND INTANGIBLE ASSETS (Identifiable Intangible Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	$ 313	$ 309
Finite And Indefinite Lived Intangible Assets Gross	722	848
Customer-Related Intangible Assets [Member]
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	494	561
Finite-Lived Intangible Assets, Accumulated Amortization	156	157
Noncompete Agreements [Member]
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	70	74
Finite-Lived Intangible Assets, Accumulated Amortization	55	53
Intellectual Property [Member]
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	51	44
Finite And Indefinite Lived Intangible Assets Gross	60	61
Use Rights [Member]
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	5	9
Finite And Indefinite Lived Intangible Assets Gross	32	81
Fuel And Power Agreements [Member]
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	5	5
Finite-Lived Intangible Assets, Accumulated Amortization	3	3
Computer Software, Intangible Asset [Member]
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	21	23
Finite-Lived Intangible Assets, Accumulated Amortization	20	22
Other Intangible Assets [Member]
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Finite-Lived Intangible Assets, Gross	40	43
Finite-Lived Intangible Assets, Accumulated Amortization	$ 23	$ 21